Random? White flashing (with Hyperion Grabber)

[timobro]

I have just installed a DC5V WS2812B strip (60 leds/m) of about 220cm on the back of my MiTV.
Hyperion is running on my Raspberry Pi 3B (together with a PiHole).
Hyperion Grabber is used to capture the screen.
The strip is connected to a esp32 controller running WLED.
This is integrated in Hyperion.

When I am using some effects with WLED I dont seem to run into any issues.

However when I am using it on Hyperion I (randomly?) appear to have some white flashing of the whole strip?

The total of 130 Leds is powered by a 5V 8A power supply (which is also recommended by WLED). Ground of the controller and the strip are connected. The controller itself is powered by a seperated USB power supply (via micro usb).

VID-20240329-WA0008.mp4

Any idea what could cause this?

€dit: HyperHDR also says that Undervoltage (I assume of the raspberry pi) has been detected? Could that be a reason?